That is fantastic comparison U.C.! Thanks to you and your friend.
You really, REALLY showed that there are many aspects of lens performance.
It would be interesting to see if there are focus shifts too (I'm taking cover now).
What are your preferences?

Great work, thanks for doing the comparison!
It might have been nice to equalize the field of view (rather than shooting at constant distance) for the resolution tests; it's sometimes hard to see whether resolution differences with the Minolta 58 or CV 40 are real or just due to the scaled up/down segment of wall being viewed.
Also, are the "corner" crops from at the very corners of the frame? If so, it might also be nice to show near-corner crops, since in my experience many lenses have an extremely fast resolution falloff right at the extreme corners (in the area that would often be covered by the rounded corners of a slide holder).

Thanks!
Some conclusions I made after the tests:
-don't buy a 50/1.0L, it's a one trick pony.
-the 50/1.2L is sharper than my Sigma 50/1.4.
-I like the colors of my Rokkor 58/1.2 the most.
-the Rokkor 45/2 does have some field curvature.

If I had the cash, I'd have every desirable 50 ever made. I've shot with around 15 different 50s.

My conclusions(for what they matter, sans pictures) were that the Sigma 50 is the best AF 50 for Canon. The Zuiko 50/2 and Zeiss 50/2 are the best options around if you don't need AF. I love the bokeh out of the rokkor 58, nikon 58, FL 55, c/y 1.7 and 1.4, tak 1.4 and the /2 macros. If I was on Nikon, I'd shoot with a CV 58.

great work. thanks.
I have the 58/1.2 & just got a 50MP and it's great to see how they measure up. Once I get my leitax adapter I hope to see how the 50MP stacks up against my 50'cron, these tests is a good example of what to look for.

As a licensed nitpicker I have to make a negative comment and I agree with mpmendenhall's comment on equalized shooting distances. Make it two comments... the last set of images should have been processed to the same resulting white balance and exposure. The bokeh test doesn't reveal anything about the swirly and busy bokeh often seen in, for example, the Minolta 58/1.2 lens wide open. The focus shift is also not covered.

Sound a bit negative, no? Still your presentation is one of the best I have seen!

Your result matches anything else I have seen and also my own experience from these lenses (except for the shorter 40-45mm ones and the EF50/1.0 which I never seen in real life).

great test! looks like a lot of work. i'm guessing you didn't refocus on the corners for the corner crops? another vote for reframing different focal lengths to match field of view.

with regard to the rokkor 45mm, i'm pretty sure that's just edge softness not field curvature. in my test of it on aps-c i saw that same corner softness even though i refocused to get maximum sharpness in the center.